<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet", href="style.css">
    <title>test html</title>
</head>
<body>
<div class="block01">导航栏</div>
<div class="block02">侧边栏</div>
<div class="block03">主要内容页</div>
<div class="block04">页脚</div>
</body>
</html>